author | david |
Tue, 29 Sep 2015 11:02:08 +0200 | |
changeset 33105 | 294e48b4f704 |
parent 31592 | 43f48e165466 |
child 33148 | 68fa8b6c4340 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "classfile/dictionary.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "memory/iterator.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "prims/jvmtiRedefineClassesTrace.hpp" |
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#include "runtime/orderAccess.inline.hpp" |
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#include "utilities/hashtable.inline.hpp" |
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PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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DictionaryEntry* Dictionary::_current_class_entry = NULL; |
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int Dictionary::_current_class_index = 0; |
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Dictionary::Dictionary(int table_size) |
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: TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry)) { |
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_current_class_index = 0; |
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_current_class_entry = NULL; |
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_pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
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}; |
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Dictionary::Dictionary(int table_size, HashtableBucket<mtClass>* t, |
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int number_of_entries) |
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: TwoOopHashtable<Klass*, mtClass>(table_size, sizeof(DictionaryEntry), t, number_of_entries) { |
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_current_class_index = 0; |
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_current_class_entry = NULL; |
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_pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize); |
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}; |
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ProtectionDomainCacheEntry* Dictionary::cache_get(oop protection_domain) { |
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return _pd_cache_table->get(protection_domain); |
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} |
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DictionaryEntry* Dictionary::new_entry(unsigned int hash, Klass* klass, |
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ClassLoaderData* loader_data) { |
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DictionaryEntry* entry = (DictionaryEntry*)Hashtable<Klass*, mtClass>::new_entry(hash, klass); |
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entry->set_loader_data(loader_data); |
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entry->set_pd_set(NULL); |
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assert(klass->oop_is_instance(), "Must be"); |
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return entry; |
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} |
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void Dictionary::free_entry(DictionaryEntry* entry) { |
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// avoid recursion when deleting linked list |
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while (entry->pd_set() != NULL) { |
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ProtectionDomainEntry* to_delete = entry->pd_set(); |
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entry->set_pd_set(to_delete->next()); |
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delete to_delete; |
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} |
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Hashtable<Klass*, mtClass>::free_entry(entry); |
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} |
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bool DictionaryEntry::contains_protection_domain(oop protection_domain) const { |
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#ifdef ASSERT |
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if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
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// Ensure this doesn't show up in the pd_set (invariant) |
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bool in_pd_set = false; |
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for (ProtectionDomainEntry* current = _pd_set; |
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current != NULL; |
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current = current->next()) { |
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if (current->protection_domain() == protection_domain) { |
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in_pd_set = true; |
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break; |
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} |
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} |
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if (in_pd_set) { |
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assert(false, "A klass's protection domain should not show up " |
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"in its sys. dict. PD set"); |
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} |
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} |
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#endif /* ASSERT */ |
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if (protection_domain == InstanceKlass::cast(klass())->protection_domain()) { |
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// Succeeds trivially |
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return true; |
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} |
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for (ProtectionDomainEntry* current = _pd_set; |
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current != NULL; |
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current = current->next()) { |
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if (current->protection_domain() == protection_domain) return true; |
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} |
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return false; |
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} |
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void DictionaryEntry::add_protection_domain(Dictionary* dict, oop protection_domain) { |
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assert_locked_or_safepoint(SystemDictionary_lock); |
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if (!contains_protection_domain(protection_domain)) { |
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ProtectionDomainCacheEntry* entry = dict->cache_get(protection_domain); |
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ProtectionDomainEntry* new_head = |
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new ProtectionDomainEntry(entry, _pd_set); |
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// Warning: Preserve store ordering. The SystemDictionary is read |
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// without locks. The new ProtectionDomainEntry must be |
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// complete before other threads can be allowed to see it |
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// via a store to _pd_set. |
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OrderAccess::release_store_ptr(&_pd_set, new_head); |
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} |
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if (TraceProtectionDomainVerification && WizardMode) { |
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print(); |
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} |
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} |
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void Dictionary::do_unloading() { |
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assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
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// Remove unloadable entries and classes from system dictionary |
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// The placeholder array has been handled in always_strong_oops_do. |
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DictionaryEntry* probe = NULL; |
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for (int index = 0; index < table_size(); index++) { |
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for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { |
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probe = *p; |
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Klass* e = probe->klass(); |
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ClassLoaderData* loader_data = probe->loader_data(); |
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InstanceKlass* ik = InstanceKlass::cast(e); |
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// Non-unloadable classes were handled in always_strong_oops_do |
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if (!is_strongly_reachable(loader_data, e)) { |
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// Entry was not visited in phase1 (negated test from phase1) |
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assert(!loader_data->is_the_null_class_loader_data(), "unloading entry with null class loader"); |
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ClassLoaderData* k_def_class_loader_data = ik->class_loader_data(); |
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// Do we need to delete this system dictionary entry? |
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bool purge_entry = false; |
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// Do we need to delete this system dictionary entry? |
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if (loader_data->is_unloading()) { |
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// If the loader is not live this entry should always be |
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// removed (will never be looked up again). |
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purge_entry = true; |
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} else { |
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// The loader in this entry is alive. If the klass is dead, |
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// (determined by checking the defining class loader) |
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// the loader must be an initiating loader (rather than the |
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// defining loader). Remove this entry. |
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if (k_def_class_loader_data->is_unloading()) { |
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// If we get here, the class_loader_data must not be the defining |
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// loader, it must be an initiating one. |
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assert(k_def_class_loader_data != loader_data, |
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"cannot have live defining loader and unreachable klass"); |
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// Loader is live, but class and its defining loader are dead. |
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// Remove the entry. The class is going away. |
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purge_entry = true; |
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} |
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} |
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if (purge_entry) { |
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*p = probe->next(); |
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if (probe == _current_class_entry) { |
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_current_class_entry = NULL; |
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} |
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free_entry(probe); |
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continue; |
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} |
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} |
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p = probe->next_addr(); |
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} |
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} |
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} |
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void Dictionary::roots_oops_do(OopClosure* strong, OopClosure* weak) { |
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// Skip the strong roots probe marking if the closures are the same. |
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if (strong == weak) { |
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oops_do(strong); |
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return; |
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} |
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for (int index = 0; index < table_size(); index++) { |
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for (DictionaryEntry *probe = bucket(index); |
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probe != NULL; |
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probe = probe->next()) { |
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Klass* e = probe->klass(); |
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ClassLoaderData* loader_data = probe->loader_data(); |
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if (is_strongly_reachable(loader_data, e)) { |
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probe->set_strongly_reachable(); |
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} |
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} |
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} |
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_pd_cache_table->roots_oops_do(strong, weak); |
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} |
1 | 211 |
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void Dictionary::remove_classes_in_error_state() { |
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assert(DumpSharedSpaces, "supported only when dumping"); |
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DictionaryEntry* probe = NULL; |
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for (int index = 0; index < table_size(); index++) { |
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for (DictionaryEntry** p = bucket_addr(index); *p != NULL; ) { |
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probe = *p; |
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InstanceKlass* ik = InstanceKlass::cast(probe->klass()); |
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if (ik->is_in_error_state()) { // purge this entry |
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*p = probe->next(); |
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if (probe == _current_class_entry) { |
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_current_class_entry = NULL; |
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} |
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free_entry(probe); |
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ResourceMark rm; |
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tty->print_cr("Preload Warning: Removed error class: %s", ik->external_name()); |
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continue; |
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} |
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|
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p = probe->next_addr(); |
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} |
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} |
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} |
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void Dictionary::always_strong_oops_do(OopClosure* blk) { |
20405 | 236 |
// Follow all system classes and temporary placeholders in dictionary; only |
237 |
// protection domain oops contain references into the heap. In a first |
|
238 |
// pass over the system dictionary determine which need to be treated as |
|
239 |
// strongly reachable and mark them as such. |
|
1 | 240 |
for (int index = 0; index < table_size(); index++) { |
241 |
for (DictionaryEntry *probe = bucket(index); |
|
242 |
probe != NULL; |
|
243 |
probe = probe->next()) { |
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Klass* e = probe->klass(); |
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ClassLoaderData* loader_data = probe->loader_data(); |
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if (is_strongly_reachable(loader_data, e)) { |
20405 | 247 |
probe->set_strongly_reachable(); |
1 | 248 |
} |
249 |
} |
|
250 |
} |
|
20405 | 251 |
// Then iterate over the protection domain cache to apply the closure on the |
252 |
// previously marked ones. |
|
253 |
_pd_cache_table->always_strong_oops_do(blk); |
|
1 | 254 |
} |
255 |
||
256 |
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void Dictionary::always_strong_classes_do(KlassClosure* closure) { |
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// Follow all system classes and temporary placeholders in dictionary |
1 | 259 |
for (int index = 0; index < table_size(); index++) { |
260 |
for (DictionaryEntry* probe = bucket(index); |
|
261 |
probe != NULL; |
|
262 |
probe = probe->next()) { |
|
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Klass* e = probe->klass(); |
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ClassLoaderData* loader_data = probe->loader_data(); |
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if (is_strongly_reachable(loader_data, e)) { |
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closure->do_klass(e); |
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} |
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} |
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} |
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} |
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271 |
|
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272 |
|
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// Just the classes from defining class loaders |
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void Dictionary::classes_do(void f(Klass*)) { |
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for (int index = 0; index < table_size(); index++) { |
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for (DictionaryEntry* probe = bucket(index); |
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probe != NULL; |
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probe = probe->next()) { |
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Klass* k = probe->klass(); |
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280 |
if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
1 | 281 |
f(k); |
282 |
} |
|
283 |
} |
|
284 |
} |
|
285 |
} |
|
286 |
||
287 |
// Added for initialize_itable_for_klass to handle exceptions |
|
288 |
// Just the classes from defining class loaders |
|
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void Dictionary::classes_do(void f(Klass*, TRAPS), TRAPS) { |
1 | 290 |
for (int index = 0; index < table_size(); index++) { |
291 |
for (DictionaryEntry* probe = bucket(index); |
|
292 |
probe != NULL; |
|
293 |
probe = probe->next()) { |
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Klass* k = probe->klass(); |
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if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
1 | 296 |
f(k, CHECK); |
297 |
} |
|
298 |
} |
|
299 |
} |
|
300 |
} |
|
301 |
||
302 |
// All classes, and their class loaders |
|
303 |
// Don't iterate over placeholders |
|
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304 |
void Dictionary::classes_do(void f(Klass*, ClassLoaderData*)) { |
1 | 305 |
for (int index = 0; index < table_size(); index++) { |
306 |
for (DictionaryEntry* probe = bucket(index); |
|
307 |
probe != NULL; |
|
308 |
probe = probe->next()) { |
|
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Klass* k = probe->klass(); |
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310 |
f(k, probe->loader_data()); |
1 | 311 |
} |
312 |
} |
|
313 |
} |
|
314 |
||
315 |
void Dictionary::oops_do(OopClosure* f) { |
|
20405 | 316 |
// Only the protection domain oops contain references into the heap. Iterate |
317 |
// over all of them. |
|
318 |
_pd_cache_table->oops_do(f); |
|
1 | 319 |
} |
320 |
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void Dictionary::methods_do(void f(Method*)) { |
1 | 322 |
for (int index = 0; index < table_size(); index++) { |
323 |
for (DictionaryEntry* probe = bucket(index); |
|
324 |
probe != NULL; |
|
325 |
probe = probe->next()) { |
|
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Klass* k = probe->klass(); |
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327 |
if (probe->loader_data() == InstanceKlass::cast(k)->class_loader_data()) { |
1 | 328 |
// only take klass is we have the entry with the defining class loader |
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329 |
InstanceKlass::cast(k)->methods_do(f); |
1 | 330 |
} |
331 |
} |
|
332 |
} |
|
333 |
} |
|
334 |
||
20405 | 335 |
void Dictionary::unlink(BoolObjectClosure* is_alive) { |
336 |
// Only the protection domain cache table may contain references to the heap |
|
337 |
// that need to be unlinked. |
|
338 |
_pd_cache_table->unlink(is_alive); |
|
339 |
} |
|
1 | 340 |
|
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341 |
Klass* Dictionary::try_get_next_class() { |
1 | 342 |
while (true) { |
343 |
if (_current_class_entry != NULL) { |
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Klass* k = _current_class_entry->klass(); |
1 | 345 |
_current_class_entry = _current_class_entry->next(); |
346 |
return k; |
|
347 |
} |
|
348 |
_current_class_index = (_current_class_index + 1) % table_size(); |
|
349 |
_current_class_entry = bucket(_current_class_index); |
|
350 |
} |
|
351 |
// never reached |
|
352 |
} |
|
353 |
||
354 |
// Add a loaded class to the system dictionary. |
|
355 |
// Readers of the SystemDictionary aren't always locked, so _buckets |
|
356 |
// is volatile. The store of the next field in the constructor is |
|
357 |
// also cast to volatile; we do this to ensure store order is maintained |
|
358 |
// by the compilers. |
|
359 |
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360 |
void Dictionary::add_klass(Symbol* class_name, ClassLoaderData* loader_data, |
1 | 361 |
KlassHandle obj) { |
362 |
assert_locked_or_safepoint(SystemDictionary_lock); |
|
363 |
assert(obj() != NULL, "adding NULL obj"); |
|
14488 | 364 |
assert(obj()->name() == class_name, "sanity check on name"); |
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365 |
assert(loader_data != NULL, "Must be non-NULL"); |
1 | 366 |
|
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unsigned int hash = compute_hash(class_name, loader_data); |
1 | 368 |
int index = hash_to_index(hash); |
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369 |
DictionaryEntry* entry = new_entry(hash, obj(), loader_data); |
1 | 370 |
add_entry(index, entry); |
371 |
} |
|
372 |
||
373 |
||
374 |
// This routine does not lock the system dictionary. |
|
375 |
// |
|
376 |
// Since readers don't hold a lock, we must make sure that system |
|
377 |
// dictionary entries are only removed at a safepoint (when only one |
|
378 |
// thread is running), and are added to in a safe way (all links must |
|
379 |
// be updated in an MT-safe manner). |
|
380 |
// |
|
381 |
// Callers should be aware that an entry could be added just after |
|
382 |
// _buckets[index] is read here, so the caller will not see the new entry. |
|
383 |
DictionaryEntry* Dictionary::get_entry(int index, unsigned int hash, |
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384 |
Symbol* class_name, |
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|
385 |
ClassLoaderData* loader_data) { |
1 | 386 |
debug_only(_lookup_count++); |
387 |
for (DictionaryEntry* entry = bucket(index); |
|
388 |
entry != NULL; |
|
389 |
entry = entry->next()) { |
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|
390 |
if (entry->hash() == hash && entry->equals(class_name, loader_data)) { |
1 | 391 |
return entry; |
392 |
} |
|
393 |
debug_only(_lookup_length++); |
|
394 |
} |
|
395 |
return NULL; |
|
396 |
} |
|
397 |
||
398 |
||
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399 |
Klass* Dictionary::find(int index, unsigned int hash, Symbol* name, |
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400 |
ClassLoaderData* loader_data, Handle protection_domain, TRAPS) { |
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|
401 |
DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
1 | 402 |
if (entry != NULL && entry->is_valid_protection_domain(protection_domain)) { |
403 |
return entry->klass(); |
|
404 |
} else { |
|
405 |
return NULL; |
|
406 |
} |
|
407 |
} |
|
408 |
||
409 |
||
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410 |
Klass* Dictionary::find_class(int index, unsigned int hash, |
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|
411 |
Symbol* name, ClassLoaderData* loader_data) { |
1 | 412 |
assert_locked_or_safepoint(SystemDictionary_lock); |
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413 |
assert (index == index_for(name, loader_data), "incorrect index?"); |
1 | 414 |
|
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415 |
DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
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416 |
return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
1 | 417 |
} |
418 |
||
419 |
||
420 |
// Variant of find_class for shared classes. No locking required, as |
|
421 |
// that table is static. |
|
422 |
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423 |
Klass* Dictionary::find_shared_class(int index, unsigned int hash, |
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Symbol* name) { |
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|
425 |
assert (index == index_for(name, NULL), "incorrect index?"); |
1 | 426 |
|
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427 |
DictionaryEntry* entry = get_entry(index, hash, name, NULL); |
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|
428 |
return (entry != NULL) ? entry->klass() : (Klass*)NULL; |
1 | 429 |
} |
430 |
||
431 |
||
432 |
void Dictionary::add_protection_domain(int index, unsigned int hash, |
|
433 |
instanceKlassHandle klass, |
|
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|
434 |
ClassLoaderData* loader_data, Handle protection_domain, |
1 | 435 |
TRAPS) { |
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436 |
Symbol* klass_name = klass->name(); |
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|
437 |
DictionaryEntry* entry = get_entry(index, hash, klass_name, loader_data); |
1 | 438 |
|
439 |
assert(entry != NULL,"entry must be present, we just created it"); |
|
440 |
assert(protection_domain() != NULL, |
|
441 |
"real protection domain should be present"); |
|
442 |
||
20405 | 443 |
entry->add_protection_domain(this, protection_domain()); |
1 | 444 |
|
445 |
assert(entry->contains_protection_domain(protection_domain()), |
|
446 |
"now protection domain should be present"); |
|
447 |
} |
|
448 |
||
449 |
||
450 |
bool Dictionary::is_valid_protection_domain(int index, unsigned int hash, |
|
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|
451 |
Symbol* name, |
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|
452 |
ClassLoaderData* loader_data, |
1 | 453 |
Handle protection_domain) { |
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|
454 |
DictionaryEntry* entry = get_entry(index, hash, name, loader_data); |
1 | 455 |
return entry->is_valid_protection_domain(protection_domain); |
456 |
} |
|
457 |
||
458 |
||
459 |
void Dictionary::reorder_dictionary() { |
|
460 |
||
461 |
// Copy all the dictionary entries into a single master list. |
|
462 |
||
463 |
DictionaryEntry* master_list = NULL; |
|
464 |
for (int i = 0; i < table_size(); ++i) { |
|
465 |
DictionaryEntry* p = bucket(i); |
|
466 |
while (p != NULL) { |
|
467 |
DictionaryEntry* tmp; |
|
468 |
tmp = p->next(); |
|
469 |
p->set_next(master_list); |
|
470 |
master_list = p; |
|
471 |
p = tmp; |
|
472 |
} |
|
473 |
set_entry(i, NULL); |
|
474 |
} |
|
475 |
||
476 |
// Add the dictionary entries back to the list in the correct buckets. |
|
477 |
while (master_list != NULL) { |
|
478 |
DictionaryEntry* p = master_list; |
|
479 |
master_list = master_list->next(); |
|
480 |
p->set_next(NULL); |
|
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481 |
Symbol* class_name = InstanceKlass::cast((Klass*)(p->klass()))->name(); |
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482 |
// Since the null class loader data isn't copied to the CDS archive, |
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|
483 |
// compute the hash with NULL for loader data. |
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|
484 |
unsigned int hash = compute_hash(class_name, NULL); |
1 | 485 |
int index = hash_to_index(hash); |
486 |
p->set_hash(hash); |
|
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|
487 |
p->set_loader_data(NULL); // loader_data isn't copied to CDS |
1 | 488 |
p->set_next(bucket(index)); |
489 |
set_entry(index, p); |
|
490 |
} |
|
491 |
} |
|
492 |
||
20405 | 493 |
ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size) |
494 |
: Hashtable<oop, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry)) |
|
495 |
{ |
|
496 |
} |
|
497 |
||
498 |
void ProtectionDomainCacheTable::unlink(BoolObjectClosure* is_alive) { |
|
499 |
assert(SafepointSynchronize::is_at_safepoint(), "must be"); |
|
500 |
for (int i = 0; i < table_size(); ++i) { |
|
501 |
ProtectionDomainCacheEntry** p = bucket_addr(i); |
|
502 |
ProtectionDomainCacheEntry* entry = bucket(i); |
|
503 |
while (entry != NULL) { |
|
504 |
if (is_alive->do_object_b(entry->literal())) { |
|
505 |
p = entry->next_addr(); |
|
506 |
} else { |
|
507 |
*p = entry->next(); |
|
508 |
free_entry(entry); |
|
509 |
} |
|
510 |
entry = *p; |
|
511 |
} |
|
512 |
} |
|
513 |
} |
|
514 |
||
515 |
void ProtectionDomainCacheTable::oops_do(OopClosure* f) { |
|
516 |
for (int index = 0; index < table_size(); index++) { |
|
517 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
518 |
probe != NULL; |
|
519 |
probe = probe->next()) { |
|
520 |
probe->oops_do(f); |
|
521 |
} |
|
522 |
} |
|
523 |
} |
|
524 |
||
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
525 |
void ProtectionDomainCacheTable::roots_oops_do(OopClosure* strong, OopClosure* weak) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
526 |
for (int index = 0; index < table_size(); index++) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
527 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
528 |
probe != NULL; |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
529 |
probe = probe->next()) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
530 |
if (probe->is_strongly_reachable()) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
531 |
probe->reset_strongly_reachable(); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
532 |
probe->oops_do(strong); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
533 |
} else { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
534 |
if (weak != NULL) { |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
535 |
probe->oops_do(weak); |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
536 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
537 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
538 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
539 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
540 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
541 |
|
20405 | 542 |
uint ProtectionDomainCacheTable::bucket_size() { |
543 |
return sizeof(ProtectionDomainCacheEntry); |
|
544 |
} |
|
545 |
||
546 |
#ifndef PRODUCT |
|
547 |
void ProtectionDomainCacheTable::print() { |
|
548 |
tty->print_cr("Protection domain cache table (table_size=%d, classes=%d)", |
|
549 |
table_size(), number_of_entries()); |
|
550 |
for (int index = 0; index < table_size(); index++) { |
|
551 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
552 |
probe != NULL; |
|
553 |
probe = probe->next()) { |
|
554 |
probe->print(); |
|
555 |
} |
|
556 |
} |
|
557 |
} |
|
558 |
||
559 |
void ProtectionDomainCacheEntry::print() { |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
27618
diff
changeset
|
560 |
tty->print_cr("entry " PTR_FORMAT " value " PTR_FORMAT " strongly_reachable %d next " PTR_FORMAT, |
20408 | 561 |
this, (void*)literal(), _strongly_reachable, next()); |
20405 | 562 |
} |
563 |
#endif |
|
564 |
||
565 |
void ProtectionDomainCacheTable::verify() { |
|
566 |
int element_count = 0; |
|
567 |
for (int index = 0; index < table_size(); index++) { |
|
568 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
569 |
probe != NULL; |
|
570 |
probe = probe->next()) { |
|
571 |
probe->verify(); |
|
572 |
element_count++; |
|
573 |
} |
|
574 |
} |
|
575 |
guarantee(number_of_entries() == element_count, |
|
576 |
"Verify of protection domain cache table failed"); |
|
577 |
debug_only(verify_lookup_length((double)number_of_entries() / table_size())); |
|
578 |
} |
|
579 |
||
580 |
void ProtectionDomainCacheEntry::verify() { |
|
581 |
guarantee(literal()->is_oop(), "must be an oop"); |
|
582 |
} |
|
583 |
||
584 |
void ProtectionDomainCacheTable::always_strong_oops_do(OopClosure* f) { |
|
585 |
// the caller marked the protection domain cache entries that we need to apply |
|
586 |
// the closure on. Only process them. |
|
587 |
for (int index = 0; index < table_size(); index++) { |
|
588 |
for (ProtectionDomainCacheEntry* probe = bucket(index); |
|
589 |
probe != NULL; |
|
590 |
probe = probe->next()) { |
|
591 |
if (probe->is_strongly_reachable()) { |
|
592 |
probe->reset_strongly_reachable(); |
|
593 |
probe->oops_do(f); |
|
594 |
} |
|
595 |
} |
|
596 |
} |
|
597 |
} |
|
598 |
||
599 |
ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(oop protection_domain) { |
|
600 |
unsigned int hash = compute_hash(protection_domain); |
|
601 |
int index = hash_to_index(hash); |
|
602 |
||
603 |
ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain); |
|
604 |
if (entry == NULL) { |
|
605 |
entry = add_entry(index, hash, protection_domain); |
|
606 |
} |
|
607 |
return entry; |
|
608 |
} |
|
609 |
||
610 |
ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, oop protection_domain) { |
|
611 |
for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
612 |
if (e->protection_domain() == protection_domain) { |
|
613 |
return e; |
|
614 |
} |
|
615 |
} |
|
616 |
||
617 |
return NULL; |
|
618 |
} |
|
619 |
||
620 |
ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, oop protection_domain) { |
|
621 |
assert_locked_or_safepoint(SystemDictionary_lock); |
|
622 |
assert(index == index_for(protection_domain), "incorrect index?"); |
|
623 |
assert(find_entry(index, protection_domain) == NULL, "no double entry"); |
|
624 |
||
625 |
ProtectionDomainCacheEntry* p = new_entry(hash, protection_domain); |
|
626 |
Hashtable<oop, mtClass>::add_entry(index, p); |
|
627 |
return p; |
|
628 |
} |
|
629 |
||
630 |
void ProtectionDomainCacheTable::free(ProtectionDomainCacheEntry* to_delete) { |
|
631 |
unsigned int hash = compute_hash(to_delete->protection_domain()); |
|
632 |
int index = hash_to_index(hash); |
|
633 |
||
634 |
ProtectionDomainCacheEntry** p = bucket_addr(index); |
|
635 |
ProtectionDomainCacheEntry* entry = bucket(index); |
|
636 |
while (true) { |
|
637 |
assert(entry != NULL, "sanity"); |
|
638 |
||
639 |
if (entry == to_delete) { |
|
640 |
*p = entry->next(); |
|
641 |
Hashtable<oop, mtClass>::free_entry(entry); |
|
642 |
break; |
|
643 |
} else { |
|
644 |
p = entry->next_addr(); |
|
645 |
entry = *p; |
|
646 |
} |
|
647 |
} |
|
648 |
} |
|
649 |
||
2534 | 650 |
SymbolPropertyTable::SymbolPropertyTable(int table_size) |
13195 | 651 |
: Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry)) |
2534 | 652 |
{ |
653 |
} |
|
13195 | 654 |
SymbolPropertyTable::SymbolPropertyTable(int table_size, HashtableBucket<mtSymbol>* t, |
2534 | 655 |
int number_of_entries) |
13195 | 656 |
: Hashtable<Symbol*, mtSymbol>(table_size, sizeof(SymbolPropertyEntry), t, number_of_entries) |
2534 | 657 |
{ |
658 |
} |
|
659 |
||
660 |
||
661 |
SymbolPropertyEntry* SymbolPropertyTable::find_entry(int index, unsigned int hash, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
662 |
Symbol* sym, |
5420
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
663 |
intptr_t sym_mode) { |
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
664 |
assert(index == index_for(sym, sym_mode), "incorrect index?"); |
2534 | 665 |
for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
666 |
if (p->hash() == hash && p->symbol() == sym && p->symbol_mode() == sym_mode) { |
2534 | 667 |
return p; |
668 |
} |
|
669 |
} |
|
670 |
return NULL; |
|
671 |
} |
|
672 |
||
673 |
||
674 |
SymbolPropertyEntry* SymbolPropertyTable::add_entry(int index, unsigned int hash, |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
675 |
Symbol* sym, intptr_t sym_mode) { |
2534 | 676 |
assert_locked_or_safepoint(SystemDictionary_lock); |
5420
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
677 |
assert(index == index_for(sym, sym_mode), "incorrect index?"); |
586d3988e72b
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
2534
diff
changeset
|
678 |
assert(find_entry(index, hash, sym, sym_mode) == NULL, "no double entry"); |
2534 | 679 |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7397
diff
changeset
|
680 |
SymbolPropertyEntry* p = new_entry(hash, sym, sym_mode); |
13195 | 681 |
Hashtable<Symbol*, mtSymbol>::add_entry(index, p); |
2534 | 682 |
return p; |
683 |
} |
|
684 |
||
685 |
void SymbolPropertyTable::oops_do(OopClosure* f) { |
|
686 |
for (int index = 0; index < table_size(); index++) { |
|
687 |
for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
688 |
if (p->method_type() != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
689 |
f->do_oop(p->method_type_addr()); |
2534 | 690 |
} |
691 |
} |
|
692 |
} |
|
693 |
} |
|
694 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
695 |
void SymbolPropertyTable::methods_do(void f(Method*)) { |
2534 | 696 |
for (int index = 0; index < table_size(); index++) { |
697 |
for (SymbolPropertyEntry* p = bucket(index); p != NULL; p = p->next()) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
698 |
Method* prop = p->method(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
699 |
if (prop != NULL) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
700 |
f((Method*)prop); |
2534 | 701 |
} |
702 |
} |
|
703 |
} |
|
704 |
} |
|
705 |
||
1 | 706 |
|
707 |
// ---------------------------------------------------------------------------- |
|
708 |
||
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
709 |
void Dictionary::print(bool details) { |
1 | 710 |
ResourceMark rm; |
711 |
HandleMark hm; |
|
712 |
||
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
713 |
if (details) { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
714 |
tty->print_cr("Java system dictionary (table_size=%d, classes=%d)", |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
715 |
table_size(), number_of_entries()); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
716 |
tty->print_cr("^ indicates that initiating loader is different from " |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
717 |
"defining loader"); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
718 |
} |
1 | 719 |
|
720 |
for (int index = 0; index < table_size(); index++) { |
|
721 |
for (DictionaryEntry* probe = bucket(index); |
|
722 |
probe != NULL; |
|
723 |
probe = probe->next()) { |
|
724 |
if (Verbose) tty->print("%4d: ", index); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
725 |
Klass* e = probe->klass(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
726 |
ClassLoaderData* loader_data = probe->loader_data(); |
1 | 727 |
bool is_defining_class = |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
728 |
(loader_data == InstanceKlass::cast(e)->class_loader_data()); |
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
729 |
tty->print("%s%s", ((!details) || is_defining_class) ? " " : "^", |
14488 | 730 |
e->external_name()); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
731 |
|
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
732 |
if (details) { |
1 | 733 |
tty->print(", loader "); |
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
734 |
if (loader_data != NULL) { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
735 |
loader_data->print_value(); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
736 |
} else { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
737 |
tty->print("NULL"); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
738 |
} |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
739 |
} |
1 | 740 |
tty->cr(); |
741 |
} |
|
742 |
} |
|
26135
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
743 |
|
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
744 |
if (details) { |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
745 |
tty->cr(); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
746 |
_pd_cache_table->print(); |
82b516c550f7
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
25492
diff
changeset
|
747 |
} |
20405 | 748 |
tty->cr(); |
1 | 749 |
} |
750 |
||
751 |
void Dictionary::verify() { |
|
752 |
guarantee(number_of_entries() >= 0, "Verify of system dictionary failed"); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
753 |
|
1 | 754 |
int element_count = 0; |
755 |
for (int index = 0; index < table_size(); index++) { |
|
756 |
for (DictionaryEntry* probe = bucket(index); |
|
757 |
probe != NULL; |
|
758 |
probe = probe->next()) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
759 |
Klass* e = probe->klass(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
760 |
ClassLoaderData* loader_data = probe->loader_data(); |
14488 | 761 |
guarantee(e->oop_is_instance(), |
1 | 762 |
"Verify of system dictionary failed"); |
763 |
// class loader must be present; a null class loader is the |
|
764 |
// boostrap loader |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
765 |
guarantee(loader_data != NULL || DumpSharedSpaces || |
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
766 |
loader_data->class_loader() == NULL || |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
767 |
loader_data->class_loader()->is_instance(), |
1 | 768 |
"checking type of class_loader"); |
22794
f1c014ad3754
8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
coleenp
parents:
20408
diff
changeset
|
769 |
e->verify(); |
1 | 770 |
probe->verify_protection_domain_set(); |
771 |
element_count++; |
|
772 |
} |
|
773 |
} |
|
774 |
guarantee(number_of_entries() == element_count, |
|
775 |
"Verify of system dictionary failed"); |
|
776 |
debug_only(verify_lookup_length((double)number_of_entries() / table_size())); |
|
20405 | 777 |
|
778 |
_pd_cache_table->verify(); |
|
1 | 779 |
} |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
780 |